JPH09220925A - Air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner to automatically prepare it for generation of cloud of a window glass at the time when it comes to be impossible to communicate between a control device of a car air conditioner and a control panel or between the control device and each actuator. SOLUTION: Outside air is introduced by changing operation of a car air conditioner over to automatic in the case when it comes to be impossible to communicate between a controller 23 and a control panel at the time of manually operating the car air conditioner. Additionally, outside air is introduced by switching on a compressor 50 in the case when it comes to be impossible to communicate between the control device 23 and mode door actuators 6, 8, 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile air conditioner, and more particularly to an automobile air conditioner having a fail-safe function for preventing fogging of windows.

[0002]

2. Description of the Related Art Recent automobile air conditioners (hereinafter referred to as car air conditioners) are equipped with detectors for detecting information such as indoor and outdoor temperatures and the amount of solar radiation, and based on the temperatures detected by these detectors. Thus, a control device for automatically controlling the temperature inside the vehicle to a desired temperature set by an occupant is provided. In addition to the control of the temperature inside the vehicle and the amount of air blown out, there is also an automatic function for controlling the air inside the vehicle to judge the temperature and humidity and prevent the window of the vehicle from being fogged.

Even in a car air conditioner having such an automatic function, it is necessary to realize a desired air conditioning state that deviates from the automatic control. Therefore, a switch for manually adjusting the temperature and air volume is provided on the operation panel of the car air conditioner. It is provided so that the automatic and manual functions can be used together.

In such a car air conditioner, even if the detector and the actuator for driving to actually blow out the air inside the vehicle are connected to the control device by a communication line, and even if the car air conditioner having an automatic function is manually operated, Since the control is performed by the built-in computer, the operation panel and the control device are also connected by a communication line, and in case of any cause (for example, the communication line connecting the control device and the actuator or the operation panel, When the communication between the computer and the actuator or the operation panel is interrupted due to disconnection or poor contact of the switch provided on the operation panel), the control is performed as it is.

[0005]

However, in such a conventional car air conditioner, when the communication between the control device and the actuator or the operation panel is interrupted, the current control is continued as described above. Therefore, for example, when the mode that the compressor does not operate (heat mode in winter) is set as the internal air circulation and the above-mentioned communication failure occurs, the current mode is Since it is maintained, window fogging may be induced depending on the environment outside the vehicle.

Normally, such a window fog can be easily solved by setting the defrost mode or the like, but in the current car air conditioner, it is not possible to change the mode setting for the above reason. Absent.

The present invention has been made in order to solve such a conventional problem, and automatically prevents window fogging even when a state in which communication with the operation panel is impossible occurs and is comfortable. An object of the present invention is to provide an air conditioner for an automobile that can realize an air-conditioned state.

[0008]

An air conditioner for a vehicle according to claim 1 is a detector for detecting the environment inside and outside the vehicle,
Automotive air having control means for setting the passenger compartment temperature desired by the occupant based on the detector, a compressor that operates and stops according to the instructions of the control means, and a plurality of air conditioning execution means for performing air conditioning in the vehicle interior In the harmony device, the communication means for communicating between the control means and each air conditioning executing means, the communication judging means for judging whether the mutual communication is normally performed, and the communication judging means for normalizing the communication. When it is determined that the window glass has not been performed, it is characterized by having a fog preventing means for realizing an air-conditioned state in which the window glass is prevented from fog.

A vehicle air conditioner according to claim 2 is
The fog preventing means includes a switching means for switching from the air conditioning executing means judged abnormal by the communication judging means to the air conditioning executing means judged normal in the air conditioning executing means, and an outside air introducing means for introducing outside air. And a fog removing means for blowing warm air to the window of the automobile.

An air conditioner for a vehicle according to claim 3 is
The fogging prevention means has execution control means for controlling the self of each of the plurality of air conditioning execution means, and the air conditioning execution means judged to have communication abnormality by the communication judgment means is controlled by the execution control means. It is characterized by.

A vehicle air conditioner according to claim 4 is
The fog prevention means has a communication display means for displaying the judgment result of the communication judgment means to an occupant, and if the air condition execution means and the operation means are judged to be communication abnormal by the communication judgment means, automatic It is displayed on the communication display means.

[0012]

According to the air conditioner for automobiles of the present invention, even if the control means cannot communicate with the air conditioning executing means, the window glass is automatically prevented from being fogged.

A vehicle air conditioner according to claim 2 is
If it is determined that the driving of the air outlet of the air conditioning executing means is abnormal, the air outlet is switched to the fog removal by the air inlet, and the outside air is introduced to prevent the fogging of the window glass.

If it is determined that the suction port has been driven abnormally, it is possible to prevent fogging of the window glass by switching from the suction port to removing the fog from the air outlet and blowing warm air to the window of the automobile. To do.

An automobile air conditioner according to claim 3 is
Each of the plurality of air conditioning executing means has an execution control means for controlling itself, and the air conditioning executing means which cannot communicate with the control device is controlled by the execution controlling means so as to prevent the fogging of the window glass. To do.

A vehicle air conditioner according to claim 4 is
If the communication judging means judges that the air conditioning executing means and the operating means are in communication abnormality, the communication indicating means is automatically displayed to inform the occupant that the window glass may be fogged. Prevent fogging of window glass.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

First Embodiment FIG. 1 shows a schematic diagram of a car air conditioner system of the present invention.

The configuration shown in this system diagram is common to the car air conditioners of the first to third embodiments of the present invention.

FIG. 2 is a block diagram showing the configuration of a car air conditioner common to the first and second embodiments of the present invention.

The configuration and function of each part of the car air conditioner of the present embodiment will be described below with reference to FIGS. 1 and 2.

The car air conditioner system shown in FIG. 1 is mainly constructed by a control device having a microcomputer 51 and a driving IC 52. Control device 23 and operation panel 3
0 is connected by a communication line 38, and an occupant can input a desired air conditioning condition to the control device by inputting it to the operation panel 30. Further, the control device 23 and the actuators 6, 8 and 10 incorporated in the air conditioner body are connected by the communication line 40 so that the actuators 6, 8 and 10 realize the air conditioning conditions calculated by the control device. Driven.

As shown in FIG. 2, the car air-conditioner body 100 that takes in air from the inside and outside of the vehicle and adjusts the temperature of the air to the temperature required by the occupant and blows it into the vehicle is an intake unit that takes in air inside and outside the vehicle. 16, a cooler unit 18 for cooling the taken-in air, and a heater unit 20 for heating the air cooled by the cooler unit 18 and blowing out the air having a temperature required by an occupant into the passenger compartment. There is.

The intake unit 16 is provided with an air intake 3 and an air intake 1 for taking in air inside and outside the vehicle compartment. The intakes 3 and 1 are joined to the intakes 3 and 1, respectively. Open and close selectively,
A fan 7 driven by an intake door 12 and a motor 22 for switching between an outside air introduction mode and an inside air circulation mode is provided. Further, the cooler unit 18 is provided with an evaporator 5 that cools the air taken in by the fan 7.

The heater unit 20 is provided with a heater 9 for heating the air cooled by passing through the evaporator 5, and the air inlet portion of the heater 9 adjusts the amount of air passing through the heater 9. A mix door 2 is provided.

Further, behind the heater 9 (downwind side), there is a differential door 13 for blowing air to the front window of a vehicle (not shown), a vent door 11 for blowing air from the center of the instrument panel, and air for the passengers' feet. The foot doors 15 are provided respectively.

The control panel 30 provided in the vehicle compartment has a switch 29 for automatic or manual control of the car air conditioner main body 100 and the motor 2.
Fan control button 2 to set the rotation speed of 2
7, an inside / outside air changeover switch 25 for setting the modes of the inside air circulation and the outside air introduction, a balance control mode lever 32 for setting the temperature of the passenger compartment, mode switches 35a to 35c for setting the air conditioning mode, and a car air conditioner. An air conditioner switch 33 for activating the above and a defroster mode switch 37 are provided, and the control device 23 is connected to these levers and switches.

The control device 23 includes a fan control circuit 4 for controlling the fan motor 22 and an intake door actuator 6 for driving the intake door 2.
, A mix door actuator 8 for driving the mix door 9, a mode door actuator 10 for driving the differential door 13, the vent door 11, and the foot door 15, an outside air sensor 17, an inside air sensor 19, and a solar radiation sensor 21 shown in the figure.
The control device 23 controls the rotation speed of the fan motor 22, the setting position of the intake door 12, and the opening degree of the mix door 2 on the basis of various signals from the control panel 30 and signals from various sensors. To be done.

The control device 23 and the control panel 30 are connected by a communication line 38 to communicate with each other. That is, the communication line 38 is connected to the control device 2
3 performs display data communication for transmitting display data from the control panel 30 to the control panel 30, and switch state communication for notifying the state of each switch from the operation panel to the control device.

In the above-described car air conditioner, a fail-safe function that functions when communication between the control panel 30 and the control device 23 becomes impossible will be described. The fail-safe function is provided to prevent the window glass from becoming clouded when the inside / outside changeover switch 25 and the defroster switch 37 controlled by manual input to the control panel 30 do not work.

In this specification, the fail-safe function that functions when the communication between the control panel 30 and the control device 23 is disabled is described below as the first fail-safe function.

The present invention proposes two specific configurations of the first fail-safe function, one of which is the first.
An embodiment will be described below.

The fail-safe function of the first embodiment is
The input to the control device 23 is automatically switched to the auto mode and the outside air is introduced.

FIG. 3 is a flow chart showing the processing for activating the fail-safe function, which is common to the first fail-safe function. This flowchart starts when the air conditioner is turned on.

First, the occupant normally selects either the auto mode or the manual mode by the change-over switch 29, but the control device 23 determines which mode is set (S41).
If the determination is that the control in the auto mode is selected, the information about the air in the vehicle obtained by the detectors such as the outside air sensor 17, the inside air sensor 19, and the solar radiation sensor 21 is input to the control device 23 ( S53).

The control device 23 has built-in data for judging the temperature at which an occupant will feel comfortable from the amount of solar radiation and the temperature, and the information detected by the detector is collated with this built-in data to obtain the inside of the vehicle. The amount of air blown to and the temperature are set (S54, S55).

On the other hand, if the determination is that the control in the manual mode is selected, the control device 23 checks whether communication is normally performed between the switch of the control panel 30 and the control device 23 ( S49).

When it is determined that the communication is normally performed, each manually input mode (air volume, set temperature, etc.) is input to the control device 23, and in addition, introduction of outside air and setting of the fog prevention mode are determined. Yes (S42, S43,
S44, S45, S46, S47). The opening of each actuator is set based on the determination, and the air conditioning process in the manual mode is completed (S48). This process is repeated until the occupant changes the operation of the car air conditioner to the automatic mode.

When the signal from the control panel 30 is not received by the control device 23, the NG counter is immediately set (S50). The control device 23 repeatedly determines whether or not a signal from the control panel 30 has been received until 8 seconds have elapsed from the start of counting (S5).
1).

By the time 8 seconds have elapsed since the NG counter started counting, the control device 23 was controlled by the control panel 3
If the signal from 0 is received, it can be determined that the car air conditioner is operating normally, and therefore the normal manual mode process is performed.

If no input is made after the elapse of 8 seconds, the car air conditioner of the present embodiment enters the fail safe subroutine to activate the fail safe function (S5).
2).

FIG. 4 is a diagram showing a flow chart of the subroutine of the first embodiment. The fail-safe function of this embodiment starts when an input signal is not received by the control device 23 for 8 seconds and it is determined that the communication function between the control panel 30 and the control device 23 has failed.

Immediately after the start, in the first fail-safe function of the present embodiment, a process for setting all the air amounts blown out from the compressor and the air conditioner and the blowout ports to the automatic mode (S70, S71, S7).
2). Next, the outside air introduction mode is set to introduce the outside air to remove or prevent the fogging of the window glass (S7).
3). Further, the indoor temperature is set to a temperature (25 ° C. in the present embodiment) at which an occupant generally feels comfortable (S74).

The above process is repeated until the ignition switch is turned off (S75).

According to the above-described embodiment, even if a situation in which the window glass becomes cloudy and the visibility becomes poor when signals cannot be transmitted and received between the control panel and the control device, the mode is automatically switched to the automatic mode. You can clear your view.

Further, since the signal input to the control panel when the car air conditioner is operated by manual control is not transmitted to the control device and the occupant does not notice it, the temperature of 25 ° C. is automatically set. Moreover, discomfort can be reduced.

Second Embodiment Next, a second embodiment having the first fail-safe function will be described.

The fail-safe function of the second embodiment is to automatically introduce outside air when the compressor and the car air conditioner main body 100 are stopped. As described above, the system and block diagram of the car air conditioner of the second embodiment are the same as those of the first embodiment, so only the flowchart of the subroutine is shown in FIG.

In the second embodiment, when the NG counter is 8 seconds, the operation of the compressor is first judged (S80). If the compressor is in the ON state, the operation of the air conditioner is next determined, and if both are operating, the window fog is resolved, and the process is terminated (S81). However, when either the compressor or the car air conditioner is stopped, the outside air is immediately introduced to eliminate the window fogging (S82).

According to the above-described embodiment, even when the control panel and the control device cannot exchange signals with each other, the outside air is automatically introduced even if a situation occurs in which the window glass is fogged and the visibility is deteriorated. You can clear your view.

Third Embodiment FIG. 6 shows a block diagram of a car air conditioner according to a third embodiment.

As shown in FIG. 6, the car air conditioner of the third embodiment has substantially the same structure as that described in the first embodiment, and mainly collects outside air. An intake unit 16 to be put in, a cooler unit 18 for cooling the taken-in air, a heater unit 20 for heating the air cooled by the cooler unit 18, and blowing out the air having a temperature required by an occupant into a passenger compartment. Consisting of a car air conditioner main body 100, actuators 6, 8 and 10 for driving each mode door provided in the car air conditioner main body 100, a controller 23 for controlling each actuator 6, 8, 10 and a controller 23 manually. It is composed of a control panel 31 capable of inputting.

Control panel 31 of the present embodiment
Is a switch 29 for automatic control or manual control of the car air conditioner main body 100, a fan control button 46 for setting the rotation speed of the motor 22, and an inside / outside air changeover switch 4 for setting modes of inside air circulation and outside air introduction.
2 and the temperature adjustment dial 27 that sets the temperature inside the vehicle
And a defroster mode switch 37 for setting the mode of air conditioning and a defroster mode switch 37. These components are basically the same as the control panel 30 described above.
However, while the air outlets are switched by pressing the switch corresponding to each mode, the control panel 31 switches the air outlets and the rotation speed of the fan 7 by using only the air outlet selector switch 47. , The fan control button 46 is switched each time it is pressed, and normally the set temperature is displayed and the outside temperature switch 5
By selecting 5, the PTC temperature display 43 that displays the outside air temperature for about 5 seconds, the mode display 41 that displays the outlet of the air blown out by the car air conditioner, and the fan speed display 44 that displays the fan rotation speed are displayed. The intake LED 42 and the defogger LED 48 allow an occupant to visually recognize the current setting of the car air conditioner. The control device 2 is also used as a switch on the control panel 31.
3 are connected.

The control device 23 is connected to the outside air sensor 17, the inside air sensor 19, and the solar radiation sensor 21 by a signal line, and the detection information detected by each of the sensors 17, 19, 21 is constantly input to the control device 23. The microcomputer 51 of the control device 23 obtains the target blowout temperature based on the detection information and realizes the target blowout temperature.
2, 13 and 15 are opened, and the actuators 6, 8 and 10 for driving the mode doors 2, 11, 12, 13 and 15 are set to the opening degrees. Send instructions to control.

Controller 23 and actuators 6, 8, 1
0 and the fan control circuit 4 are communication lines 4 respectively
0a, 40b, and this instruction is transmitted to each actuator 6, 8, 10 via the communication line 40.

From the control device 23 to the actuators 6, 8,
Specifically, what is transmitted to 10 is an instruction to rotate the motor in the forward direction or the reverse direction, and when the rotation of the motor is completed, a switch signal for notifying the control device 23 is generated. The communication line 40 of this embodiment is
A line for transmitting the instruction data of the opening degree from the control device 23 to the actuators 6, 8, 10 and a line for the control device to detect a signal notifying that the rotation of the motor is completed are connected. With this configuration, the control device 23 detects that communication with the actuators 6, 8 and 10 is normally performed.

Further, the compressor 50 has a control device 23.
It is connected to and is started and stopped according to an instruction from the control device 23.

In this embodiment, the actuators 6, 8, 1 are used.
The communication line 38 between the control panel 30 and the control device 23 functions as a second fail-safe function because the communication function between the control device 23 and the control device 23 is interrupted. It is distinguished from the first fail-safe function that functions when there is a break. The present invention proposes a specific configuration of two types of second fail-safe functions,
In the third embodiment, one of the second fail-safe functions will be described.

The fail-safe function of the third embodiment is provided by the control device 23 to the intake door actuator 6.
Alternatively, when communication with any one of the mode door actuators 10 becomes impossible, the compressor 50 is turned on, and the mode in which communication is normally performed is automatically switched to the window fog prevention or setting. It is a thing.

FIG. 7 is a flow chart showing the processing for activating the fail-safe function of the third embodiment. This flowchart starts when the car air conditioner is turned on.

Since the fail-safe function of this embodiment functions regardless of the manual mode or the auto mode, the control device 23 first checks whether communication with each actuator is normally performed (S101). .

When it is determined that the communication is normally performed, the control device 23 determines which mode is set by the occupant (S105). If it is determined that the control in the automatic mode is selected, the control device 23 includes the outside air sensor 17, the inside air sensor 19,
Information on the air inside the vehicle obtained by a detector such as the solar radiation sensor 21 is input (S113).

Also in the present embodiment, the control device 23 determines the temperature at which the occupant may feel comfortable from the built-in data based on the amount of solar radiation and the temperature (S114), and sets the amount of air blown into the vehicle and the temperature ( S115).

On the other hand, when it is determined that the control in the manual mode is selected, the control panel 3
Each mode manually input from 1 (air volume, set temperature, etc.), introduction of outside air, setting of anti-fog mode is determined (S106, S107, S108, S10)
9, S110). Based on the determination, the anti-fog mode is set (S111), the opening of each actuator is set (S112), and the air conditioning process in the manual mode is completed. This processing is similar to the above-mentioned embodiment,
The operation is repeated until the passenger changes the operation of the car air conditioner to the automatic mode.

When communication is not normally performed between the control device 23 and the actuators 6 and 10, the NG counter is immediately set (S102). Control device 2
3 repeatedly determines whether or not signals from the actuators 6 and 10 have been received until 3 seconds have elapsed from the start of counting (S103).

Until 3 seconds have elapsed since the NG counter started counting, the actuators 6, 1 are set in the control device 23.
If signals from both 0 are received, it can be determined that the car air conditioner is operating normally, so the process returns to the start again and the processing is continued.

If no input is made after the lapse of 3 seconds, the car air conditioner of this embodiment enters the fail-safe subroutine to activate the fail-safe function (S1).
04).

FIG. 8 is a diagram showing a flowchart of the subroutine of the third embodiment. The fail-safe function of the present embodiment starts when a predetermined switch signal is not detected by the control device 23 and it is determined that the communication function between any one of the actuators 6 and 10 and the control device 23 has failed.

Immediately after the start, the compressor is turned on (S121). Next, the control device 23
Determines whether communication with the mode door actuator 10 is normally performed (S122). As a result, if the incommunicable portion is the mode door actuator 10,
It is determined whether the mode door actuator 10 is set to the outside air introduction mode (S123), if it is not the outside air introduction mode, it is set to the outside air introduction mode, and (S124) If it is already the outside air introduction mode, the state is kept as it is. Then proceed to the next processing.

On the other hand, when the incommunicable portion is not the mode door actuator 10, the control device 23 determines whether the communication with the intake actuator 6 is normally performed (S125). If the incommunicable portion is the intake actuator 6, it is determined whether the intake actuator 6 is set to the fog-prevention mode (S126). If it is not the fog-prevention mode, the fog-prevention mode is set (S127). If it is the stop mode, the flow returns to the main flow chart as it is.

According to the above embodiment, even if the communication between any of the actuators and the control device is disabled, the mode is automatically switched to the mode for preventing the window fogging by the other normally operating actuators. It can be prevented or removed.

Fourth Embodiment FIG. 9 shows a schematic diagram of a system according to the present embodiment.

FIG. 10 is a block diagram showing the structure of the car air conditioner of the fourth embodiment. Below, FIG. 9 and FIG.
0 together with the configuration of each part of the car air conditioner of the present embodiment,
The function will be described.

As shown in FIG. 9, the features of the car air conditioner of the present embodiment are that the mix door actuator 8, the mode door actuator 10, and the intake door actuator 6 each have a control IC 45, and a control device 23 having a microcomputer 51. With Local Are
This is the point that constitutes a Network.

As shown in FIG. 10, each of the car air conditioner main body 100, the control device 23, and the control panel 31 of the present embodiment has the same structure as that described in the third embodiment.

The control device 23 and the control panel 31 are connected by a communication line 38, and an occupant can input a desired air conditioning condition to the control device by inputting on the operation panel 31. Further, the control device 23 and the actuators 6, 8 and 10 incorporated in the air conditioner main body are connected by a communication line 40, and the actuators 6, 8 and 10 are input to the control device by the sensors 17, 19 and 21, respectively. The actuators 6, 8 and 10 each have a control IC 45, and they can be driven independently by the control IC 45.

The instructions sent to the actuators 6, 8, 10 via the communication line 40 are addressed to the addresses designating the actuators by the mode doors 2, 11, 12, 13, 1, 1.
The target stop position of 5 is added, and 1 bit is added to this instruction to confirm that the instruction has been received, and a parity check is performed. Control device 23
This signal detects that the communication with the actuators 6, 8 and 10 is normally performed by this signal.

Further, in the control IC 45 as well, a signal indicating that the actuators 6, 8 and 10 have been operated is controlled via the communication line 40 in order to confirm whether communication with the control device 23 is always functioning normally. It is sent to the device 23, and one bit is added to this signal for the parity check.

The control IC 45 detects that the communication with the control device 23 is normally performed by this configuration.

In the present embodiment, the control IC 45 is a custom product for driving an actuator, and the control IC 45
As the signal line 40 used for inputting / outputting 45, a one-line communication line capable of bidirectional communication is adopted.

The fourth embodiment is one of the two second fail-safe functions and is used when the control device 23 cannot communicate with the intake door actuator 6 and the mode door actuator 10. In addition, the compressor 50 is turned on and the actuator whose communication cannot be performed is independently controlled by the control IC 45 to prevent the occurrence of window fogging or to clear the window fogging. Therefore, the fail-safe function of this embodiment is processed in parallel by the control device 23 and the control IC 45.

FIG. 11 is a flow chart showing the processing carried out by the control device 23 which activates the fail-safe function of the fourth embodiment. This flowchart is
It starts when the air conditioner is turned on.

Since the fail-safe function of this embodiment functions regardless of the manual mode or the automatic mode, the control device 23 first checks whether communication with each actuator is normally performed (S201).

The process when it is determined that the communication is normally performed is the same as that of the third embodiment. That is, the control device 23 determines which mode is set by the occupant (S206). If the determination is that the control in the auto mode is selected, the information about the air in the vehicle obtained by the detectors such as the outside air sensor 17, the inside air sensor 19, and the solar radiation sensor 21 is input to the control device 23 ( S214).

Also in this embodiment, the control device 23 determines the temperature at which an occupant may feel comfortable from the built-in data based on the amount of solar radiation and the temperature (S215), and sets the amount of air blown into the vehicle and the temperature ( S216).

On the other hand, if the judgment is that the control in the manual mode is selected, each mode (air volume, set temperature, etc.) manually input from the control panel 31, introduction of outside air, setting of the fog prevention mode Judge (S207, S208, S209, S2
10, S211). Based on the judgment, the anti-fog mode is set (S112), the opening of each actuator is set (S213), and the air conditioning process in the manual mode is completed.

Also in the present embodiment, this process is repeated until the occupant changes the operation of the car air conditioner to the automatic mode.

When communication is not normally performed between the control device 23 and the actuators 6 and 10, the NG counter is immediately set (S202). Control device 2
3 repeatedly determines whether or not signals from the actuators 6 and 10 have been received until 3 seconds have elapsed from the start of counting (S203).

The controller 6, the actuators 6 and 1 are operated within 3 seconds after the NG counter starts counting.
If the signals from both 0 are received, it can be determined that the communication between the control device 23 and the actuators 6 and 10 is normally performed, and therefore the process returns to the start again and the processing is continued.

When no input is made from any of the actuators or a plurality of actuators after 3 seconds have passed, the car air conditioner of the present embodiment determines whether the compressor is currently operating (S204), and If is not running, the compressor is started and the process returns to the start (205).

On the other hand, FIG. 12 is a flowchart showing the processing of the fail-safe function performed by the control IC 45 of the mode door actuator 6 in the fourth embodiment.

Control IC of the mode door actuator 10
At 45, it is determined whether the communication with the control device 23 is functioning normally (S221), and if an abnormality occurs, the NG counter is immediately set (S222).

The control IC 45 repeatedly determines whether or not a signal has been received by the control device until 3 seconds have elapsed from the start of counting (S223). If a signal is received from the control device 23 to the control IC 45 of the mode door actuator 10 within 3 seconds after the NG counter starts counting, the communication between the mode door actuator 10 and the control device 23 is normal. Since it can be determined that it is possible to return to the start again, the processing is continued.

If no input is made after the lapse of 3 seconds, it is judged whether or not the differential door 13 is set to the position of the anti-fog mode (S224), and if it is not set, it is set to the anti-fog mode ( S225).

FIG. 13 is a flowchart showing the processing of the fail-safe function performed by the control IC 45 of the intake door actuator 6 in the fourth embodiment.

Control of intake door actuator 6 I
The C45 determines whether communication with the control device 23 is normally performed (S231), and if an abnormality occurs, the NG counter is immediately set (S232). The control IC 45 repeatedly determines whether or not the signal from the control device is received until 3 seconds have elapsed from the start of counting (S
233).

If a signal from the intake door actuator 6 is received from the control device 23 within 3 seconds after the NG counter starts counting, communication between the intake door 6 and the control device 23 is normal. Since it can be determined that the process is started, the process returns to the start again and the process is continued.

When the input is not made after 3 seconds, it is judged whether the intake door 12 is set to the position of the outside air introduction mode (S234), and if it is not set, it is set to the outside air introduction mode. (S235).

According to the above-described embodiment, when signals cannot be exchanged between the control panel, the actuator and the control device, the actuator can be controlled by the control IC to prevent or eliminate the window fogging.

Further, since the communication between the control device and the actuator is made into a LAN, the communication line can be reduced and the actuator driving circuit in the control device can be reduced, so that the size and weight of the car air conditioner can be reduced. Become.

Fifth Embodiment The fifth embodiment of the present invention will be described below.

The fifth embodiment can be applied to the configuration of the car air conditioner shown in any of the system diagrams and block diagrams described above, and can be used in combination with any of the embodiments. However, here, the control panel to be used will be described as the control panel 31.

FIG. 14 is a flow chart showing the processing for activating the fail-safe function of the fifth embodiment. This flowchart starts when the car air conditioner is turned on.

Since the fail-safe function of this embodiment functions regardless of the manual mode or the auto mode, the control device 23 first determines whether communication with the control panel is normally performed (S301). ).
As a result, if there is an abnormality in the communication, the control panel 31 is notified of the abnormality, and the occupant is instructed to display the abnormality and notify the occupant (S306).

Next, it is checked whether communication with each actuator is normally performed (S302). The processing when it is determined that the communication is normally performed is the same as that in the third and fourth embodiments, and therefore the description thereof is omitted.

Controller 23 and actuators 6, 8, 1
When the communication with 0 is not normally performed, the NG counter is immediately set (S303). The control device 23 repeatedly determines whether or not the signals from the actuators 6, 8, and 10 have been received until 3 seconds have elapsed from the start of counting (S304).

By the time 3 seconds have elapsed after the NG counter started counting, the actuator 6 was
If signals are input from all 8 and 10, it can be determined that the communication between the control device 23 and the actuators 6 and 10 is normally performed, and therefore the process returns to the start again and the processing is continued.

If no input is made after 3 seconds, the fail-safe function of the fifth embodiment is activated (S305).

FIG. 15 is a flow chart of a subroutine for explaining the fail safe function of the fifth embodiment.

In this embodiment, the actuators 6, 8,
When an abnormality occurs in the communication between any one of the ten and the control device 23, the occupant is notified of the abnormality in the occupant to prevent window fogging, or in combination with another fail-safe function, the vehicle automatically This is for notifying the occupant that this is not due to a malfunction of the car air conditioner when the setting of the air conditioner is changed.

The controller 23 first checks which of the actuators 6, 8 and 10 has caused the abnormality. First, the communication function of the mode door actuator 10 is checked (S321). As a result, if the communication with the mode door actuator 10 is not normally performed, the mode display 41 displayed on the control panel 31 is made to blink. , Informs the passenger that communication with the mode door actuator 10 is not normally performed (32
2).

Next, the communication function of the intake door actuator 6 is checked (S323). As a result, if the communication with the mode door actuator 6 is not normally performed, the intake L, which is displayed on the control panel 31, is displayed.
The display 42 of the ED is blinked to notify the passenger that communication with the intake actuator 6 cannot be performed normally (S324).

Finally, the communication function of the mix door actuator 8 is checked (S325). As a result, if the communication with the mix door actuator 8 is not normally performed,
The temperature display 43 displayed on the control panel 31 is blinked to notify the passenger that communication with the mix door actuator 8 cannot be performed normally (S32).
6).

The above blinking of the display is continued until the car air conditioner is stopped.

According to the above-described embodiment, the occupant can be immediately notified when the signals cannot be exchanged between the control panel and the control device or the actuator and the control device. In addition, when used in combination with other fail-safe functions, when other fail-safe functions automatically change the settings of the car air conditioner, inform the occupants that this is not a malfunction but a fail-safe function. You can

[0115]

According to the first aspect of the present invention, even if communication between the control device and the air-conditioning executing means is impossible, it is possible to eliminate the fogging of the window and maintain good visibility.

According to the second aspect of the present invention, even if communication between the control device and any one of the air conditioning executing means is impossible, it is possible to eliminate the fogging of the window and maintain good visibility.

According to the third aspect of the present invention, even if communication between the control device and all of the air conditioning executing means is impossible, it is possible to eliminate the cloudy state of the window and maintain good visibility.

According to the fourth aspect of the present invention, even if communication between the control device and the air-conditioning executing means or the operating means is impossible, the occupant is informed of this promptly and the window fogging state is avoided. You can Further, when used in combination with another fail-safe function, when the setting of the car air conditioner is automatically changed, the occupant can be notified that this is due to the fail-safe function.

[Brief description of drawings]

FIG. 1 is a diagram showing a system of a first embodiment, a second embodiment, and a third embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a first exemplary embodiment and a second exemplary embodiment of the present invention.

FIG. 3 is a diagram showing a flowchart of a fail-safe function according to the first and second embodiments of the present invention.

FIG. 4 is a diagram showing a subroutine of the first embodiment of the present invention.

FIG. 5 is a diagram showing a flowchart of a subroutine of the second embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a third exemplary embodiment of the present invention.

FIG. 7 is a diagram showing a flowchart of a fail-safe function according to the third embodiment of this invention.

FIG. 8 is a diagram showing a flowchart of a fail-safe function subroutine according to the third embodiment of the present invention.

FIG. 9 is a diagram showing a system according to a fourth embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a fourth exemplary embodiment of the present invention.

FIG. 11 is a diagram showing a flowchart of a fail-safe function according to the fourth embodiment of this invention.

FIG. 12 is a diagram showing a flowchart of a fail-safe function according to the fourth embodiment of this invention.

FIG. 13 is a diagram showing a flowchart of a fail-safe function according to the fourth embodiment of this invention.

FIG. 14 is a diagram showing a flowchart of a fail-safe function according to the fifth embodiment of this invention.

FIG. 15 is a diagram showing a flowchart of a subroutine of the fifth embodiment of the present invention.

[Explanation of symbols]

1, 3 ... Air intake, 2 ... Mix door, 4 ... Fan control circuit, 5 ... Evaporator, 6 ... Intake door actuator, 7 ... Fan, 8 ... Mix door actuator, 9 ... Heater, 10 ...
Mode door actuator, 11 ... Vent door, 1
2 ... intake door, 13 ... differential door, 15 ... foot door, 16 ... intake unit, 17 ... outside air sensor, 18 ... cooler unit, 19 ... inside air sensor, 2
0 ... Heater unit, 21 ... Sunlight sensor, 23 ...
Control device, 25 ... Inside / outside changeover switch, 27 ... Fan control button, 29 ... Changeover switch, 3
0, 31 ... Control panel, 32 ... Temp control mode lever, 33 ... Air conditioner switch 35 ... Mode switch, 37 ... Defroster switch,
38 ... communication line (display data, communication of switch state), 40 ... communication line (instruction to each actuator), 41 ... mode display, 42 ... intake display LE
D, 43 ... PTC temperature display, 45 ... Control IC, 50
… Compressor, 51… Drive IC.

Claims (4)

[Claims] 1. A detector for detecting an environment inside and outside a vehicle (1
7, 19, 21), a control means (23) for setting the temperature inside the vehicle compartment desired by the occupant based on the detectors (17, 19, 21), and an operation by an instruction of the control means (23), In a vehicle air conditioner having a compressor (50) to be stopped and a plurality of air conditioning executing means (6, 8, 10) for air conditioning in a vehicle compartment, the control means (23) and the respective air conditioning executing means (6, 8,
10) Communication means (40) for performing mutual communication, communication judging means (23) for judging whether mutual communication is normally performed, and the communication judging means (23) for normalizing the communication. An air conditioner for a vehicle, comprising: an anti-fog unit that realizes an air-conditioning state that prevents fogging of a window glass when it is determined that the operation is not performed. 2. The fogging preventing means is the communication judging means (23) of the air conditioning executing means (6, 8, 10).
Switching means (2) for switching from the air-conditioning executing means determined to be abnormal by the air-conditioning executing means determined to be normal
3) and an outside air introducing means (6, 12) for introducing outside air,
Fog removing means (10, 1) for blowing warm air to the windows of the automobile.
The air conditioner for an automobile according to claim 1, wherein the air conditioner has a configuration including (3). 3. The fog preventing means has execution control means (45) for controlling the self of each of the plurality of air conditioning executing means (6, 8, 10), and communication is performed by the communication determining means (23). The air conditioning apparatus for a vehicle according to claim 1, wherein the air conditioning executing means determined to be abnormal is controlled by the execution controlling means (45). 4. The communication display means (3) for displaying the judgment result of the communication judgment means (23) to an occupant.
1), and the air conditioning executing means (6, 8, 10) and the operating means (30) are the communication determining means (23).
The vehicle air conditioner according to any one of claims 1 to 3, wherein, when it is determined that the communication is abnormal, the communication display means (31) automatically displays the communication abnormality.